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The Advanced Design of a Liquid Cooling Garment Through Long-Term Research: Implications of the Test Results on Three Different Garments
Technical Paper
2009-01-2517
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The most recent goal of our research program was to identify the optimal features of each of three garments to maintain core temperature and comfort under intensive physical exertion. Four males and 2 females between the ages of 22 and 46 participated in this study. The garments evaluated were the MACS-Delphi, Russian Orlan, and NASA LCVG. Subjects were tested on different days in 2 different environmental chamber temperature/humidity conditions (24°C/H∼28%; 35°C/H∼20%). Each session consisted of stages of treadmill walking/running (250W to 700W at different stages) and rest. In general, the findings showed few consistent differences among the garments. The MACS-Delphi was better able to maintain subjects within a skin and core temperature comfort zone than was evident in the other garments as indicated by a lesser fluctuation in temperatures across physical exertion levels. The LCVG provided the greatest amount of cooling, in some conditions this resulted in body overcooling as noted in declines in skin temperature below a comfort level. Physiological findings comparing garments with and without the hood were inconclusive; however, subjects rated both the MACS-Delphi with hood and the Orlan with hood as higher in overall thermal comfort. The implication of these findings, including important features and guidelines for the new design/modifications of an advanced exploration LCG are discussed.
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Authors
- Victor S. Koscheyev - University of Minnesota
- Joe Warpeha - University of Minnesota
- Gloria R. Leon - University of Minnesota
- Jung-Hyun Kim - University of Minnesota
- Birgit Fink - University of Minnesota
- Michael L. Gernhardt - NASA Johnson Space Center
- Nicholas G. Skytland - NASA Johnson Space Center
Citation
Koscheyev, V., Warpeha, J., Leon, G., Kim, J. et al., "The Advanced Design of a Liquid Cooling Garment Through Long-Term Research: Implications of the Test Results on Three Different Garments," SAE Technical Paper 2009-01-2517, 2009, https://doi.org/10.4271/2009-01-2517.Also In
References
- Koscheyev, V.S., Leon, G.R., Treviño, R.C. 2002 An advanced physiologically based shortened liquid cooling/warming garment for comfort management in routine and emergency EVA Proceedings of the 32 nd International Conference on Environmental Systems 2002-01-2413 Warrendale, PA SAE International
- Leon, G.R., Koscheyev, V.S., Fink, B., Ciofani, P., Warpeha, J., Gernhardt, M.L., Skytland, N.G. 2009 Subjective perception of thermal and physical comfort in three liquid cooling garments SAE Technical Paper Series 2009-01-2516 Warrendale, PA SAE International